未验证 提交 ab737f90 编写于 作者: A Austin 提交者: Gitee

update zh-cn/device-dev/subsystems/subsys-sensor-guide.md.

Signed-off-by: NAustin <liaozhiqi7@huawei.com>
上级 e9948717
......@@ -8,65 +8,65 @@
1. 导入需要的包
```
#include "sensor_agent.h"
#include "sensor_agent_type.h"
```
1. 创建传感器回调函数
```
void SensorDataCallbackImpl(SensorEvent *event)
{
if(event == NULL){
return;
}
float *sensorData=(float *)event->data;
}
```
```
#include "sensor_agent.h"
#include "sensor_agent_type.h"
```
2. 创建传感器回调函数
```
void SensorDataCallbackImpl(SensorEvent *event)
{
if(event == NULL){
return;
}
float *sensorData=(float *)event->data;
}
```
>![](../public_sys-resources/icon-note.gif) **说明:**
>回调函数的格式为RecordSensorCallback类型。
1. 获取设备支持sensor列表
3. 获取设备支持sensor列表
```
SensorInfo *sensorInfo = (SensorInfo *)NULL;
int32_t count = 0;
int32_t ret = GetAllSensors(&sensorInfo, &count);
```
```
SensorInfo *sensorInfo = (SensorInfo *)NULL;
int32_t count = 0;
int32_t ret = GetAllSensors(&sensorInfo, &count);
```
1. 创建的传感器用户
4. 创建的传感器用户
```
SensorUser sensorUser;
sensorUser.callback = SensorDataCallbackImpl; //成员变量callback指向创建的回调方法
```
```
SensorUser sensorUser;
sensorUser.callback = SensorDataCallbackImpl; //成员变量callback指向创建的回调方法
```
1. 使能传感器
5. 使能传感器
```
int32_t ret = ActivateSensor(0, &sensorUser);
```
```
int32_t ret = ActivateSensor(0, &sensorUser);
```
1. 订阅传感器数据
6. 订阅传感器数据
```
int32_t ret = SubscribeSensor(0, &sensorUser);
```
```
int32_t ret = SubscribeSensor(0, &sensorUser);
```
>![](../public_sys-resources/icon-note.gif) **说明:**
>到这步就可以在实现的回调方法中获取到传感器数据。
1. 取消传感器数据订阅
7. 取消传感器数据订阅
```
int32_t ret = UnsubscribeSensor(0, &sensorUser);
```
```
int32_t ret = UnsubscribeSensor(0, &sensorUser);
```
1. 去使能一个传感器
8. 去使能一个传感器
```
int32_t ret = DeactivateSensor(0, &sensorUser);
```
```
int32_t ret = DeactivateSensor(0, &sensorUser);
```
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